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ollegr [7]
3 years ago
5

Jimmy can walk 2/9 of a mile in 2/9 of an hour. How fast does he walk in miles/hour

Mathematics
1 answer:
kobusy [5.1K]3 years ago
7 0

Answer:

The speed of jimmy = 1 mile /hour .

Step-by-step explanation:

Distance traveled by jimmy = 2/9 miles

Time taken = 2/9

Speed = distance / time = 1 mile/ hour

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There are 876 students in a school. There are 46 more boys than girls. How<br> many boys are there?
vampirchik [111]

Answer:

(876 + 46) ÷ 2 = 461 boys

5 0
3 years ago
Read 2 more answers
Company A is trying to sell its website to Company B. As part of the sale, Company A claims that the average user of their site
Ymorist [56]

Answer:

L = 3.975

Step-by-step explanation:

Given

See comment for data

Required

The lower limit 94% confidence interval

First, calculate the mean

\bar x =\frac{\sum x}{n}

\bar x =\frac{0.9+10+0.9+8.7+4.8+2.6+1+13.3+9.5+8.9+8.9+4.6}{12}

\bar x =\frac{74.1}{12}

\bar x =6.175

Next, calculate the standard deviation using:

\sigma = \sqrt{\frac{\sum(x - \bar x)^2}{n}}

So, we have:

\sigma = \sqrt{\frac{(0.9 - 6.175)^2 +(10- 6.175)^2 +.................+(8.9- 6.175)^2 +(4.6- 6.175)^2}{12}}

\sigma = \sqrt{\frac{197.2625}{12}}

\sigma = \sqrt{16.4385416667}

\sigma = 4.054

For 94% interval, the z score is

z = 1.88

So, the margin of error (E) is:

E = z * \frac{\sigma}{\sqrt n}

E = 1.88 * \frac{4.054}{\sqrt {12}}

E = 1.88 * \frac{4.054}{3.464}

E = 2.200

The confidence interval of the true mean is:

CI = (\bar x \± E)

The lower limit (L) is:

L = \bar x -E

L = 6.175 -2.200

L = 3.975

and the upper limit (U) is

U = \bar x + E

U = 6.175 + 2.200

U = 8.375

5 0
3 years ago
Can someone help me and walk me through it? Thank you:)
olya-2409 [2.1K]
First find the area of the triangle.

\sf A=\dfrac{1}{2}bh

\sf A=\dfrac{1}{2}(6)(12)

\sf A=36cm^2

ABCE is a parallelogram, this means that the area of triangle ABE is equal to the area of triangle EBC. The are of the entire trapezoid is 180 square centimeters, we already found the area of the triangle, so that leaves us with:

\sf 180-36=144

So the area of the entire parallelogram must be 144 square centimeters. So each half of the parallelogram must be equal to:

\sf 144\div 2=\boxed{\sf 72cm^2}
8 0
3 years ago
2
Crazy boy [7]

Answer:

  Each point (or pair in a proportional relationship) must share the same difference

Step-by-step explanation:

The graph of a proportional relation is a straight line through the origin. Such a line has the same ratio of y/x everywhere.

A relation in which the difference is constant will be a straight line, but it won't be through the origin. Such a relation is not proportional.

7 0
3 years ago
A city garden club is planting a square garden. They drive pegs into the ground at each corner and tie strings between each pair
Dafna1 [17]

Answer:

first blank is "rhombus"

second blank is "rectangle"

third blank is "are congruent"

Step-by-step explanation:

5 0
3 years ago
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